Main Turbine and Auxiliaries

Question 1

List the major function of the Main Turbine

Answer 1

Convert steam energy to rotational energy.

Question 2

List the major function of the Moisture Separator Reheater

Answer 2

Remove moisture to prevent nozzle & blade erosion in the LP turbine
Increase efficiency by raising temperature of HP turbine exhaust

Question 3

List the major function of the Turbine Drains

Answer 3

Remove moisture from the HP turbine

Question 4

List the major function of the Gland Steam Seals

Answer 4

Prevents the leakage of air and dirt into the HP and LP Turbine along the rotor-casing penetrations.

Question 5

List the major function of the Main Turbine journal and thrust bearings

Answer 5

Support the rotor during normal operations
Absorb axial thrust transmitted through the turbine rotor

Question 6

List the major function of the Turbine Lube Oil System

Answer 6

Supply oil for bearing lubrication and turbine support systems

Question 7

List the major function of the Rotor Turning Gear

Answer 7

Rotates turbine rotor at 1.5 rpm to minimize turbine shaft distortion during the shutdown
and startup phases of operation